PHP Vulnerability - CVE-2016-6174
applications/core/modules/front/system/content.php in Invision Power Services IPS Community Suite (aka Invision Power Board IPB or Power Board) before 4.1.13 when used with PHP before 5.4.24 or 5.5.x before 5.5.8 allows remote attackers to execute arbitrary code via the content_class parameter.